ok my tank has bin up for 2 months and i have ammonia at 0.25 ppm but never seen nitrite and i have seen nitrate at 40 ppm and 20ppm my tank is 48*24*24 i have 140 pounds of live rock and 120 pounds of live sand. i have my g3 on and a refugium. so do i just need to do a water change and i...